# Setup the project and settings
project(examples)

# Get the sources together
set(example_dirs audio core models others shaders shapes text textures)
set(CMAKE_REQUIRED_DEFINITIONS -D_POSIX_C_SOURCE=199309L)
  include(CheckSymbolExists)
  check_symbol_exists(CLOCK_MONOTONIC time.h HAVE_CLOCK_MONOTONIC)
  check_symbol_exists(QueryPerformanceCounter windows.h HAVE_QPC)
set(CMAKE_REQUIRED_DEFINITIONS)
if(HAVE_QPC OR HAVE_CLOCK_MONOTONIC)
  set(example_dirs ${example_dirs} physac)
endif()

set(example_sources)
set(example_resources)
foreach(example_dir ${example_dirs})
  # Get the .c files
  file(GLOB sources ${example_dir}/*.c)
  list(APPEND example_sources ${sources})

  # Any any resources
  file(GLOB resources ${example_dir}/resources/*)
  list(APPEND example_resources ${resources})
endforeach()

if (APPLE AND NOT CMAKE_SYSTEM STRLESS "Darwin-18.0.0")
  add_definitions(-DGL_SILENCE_DEPRECATION)
  MESSAGE(AUTHOR_WARNING "OpenGL is deprecated starting with macOS 10.14 (Mojave)!")
endif()
set(OUTPUT_EXT)
list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/others/rlgl_standalone.c)

include(CheckIncludeFile)
CHECK_INCLUDE_FILE("stdatomic.h" HAVE_STDATOMIC_H)
set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
find_package(Threads)
if (CMAKE_USE_PTHREADS_INIT AND HAVE_STDATOMIC_H)
  add_if_flag_compiles("-std=c11" CMAKE_C_FLAGS)
  if(THREADS_HAVE_PTHREAD_ARG)
    add_if_flag_compiles("-pthread" CMAKE_C_FLAGS)
  endif()
  if(CMAKE_THREAD_LIBS_INIT)
    link_libraries("${CMAKE_THREAD_LIBS_INIT}")
  endif()
else()
  # Items requiring pthreads
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_loading_thread.c)
endif()


if(${PLATFORM} MATCHES "Android")
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/others/rlgl_standalone.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/others/standard_lighting.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_3d_picking.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_vr_simulator.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_3d_camera_free.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_3d_camera_first_person.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_world_screen.c)

  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_mesh_picking.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_material_pbr.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_cubicmap.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_skybox.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_mesh_picking.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_mesh_generation.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_heightmap.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_billboard.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_rlgl_solar_system.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_rlgl_full_solar_system.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_solar_system.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_obj_viewer.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_animation.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_first_person_maze.c)

  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_custom_uniform.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_model_shader.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_postprocessing.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_raymarching.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_palette_switch.c)
  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_basic_lighting.c)

elseif(${PLATFORM} MATCHES "Web")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Os -s USE_GLFW=3 -s ASSERTIONS=1 -s WASM=1 -s ASYNCIFY")
  # Since WASM is used, ALLOW_MEMORY_GROWTH has no extra overheads
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -s ALLOW_MEMORY_GROWTH=1 --no-heap-copy")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --shell-file ${CMAKE_SOURCE_DIR}/src/shell.html")
  set(OUTPUT_EXT ".html")

  # Remove the -rdynamic flag because otherwise emscripten
  # does not generate HTML+JS+WASM files, only a non-working
  # and fat HTML
  string(REPLACE "-rdynamic" "" CMAKE_SHARED_LIBRARY_LINK_C_FLAGS ${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS})
endif()

include_directories(BEFORE SYSTEM others/external/include)

if (NOT TARGET raylib)
  find_package(raylib 2.0 REQUIRED)
endif()

# Do each example
foreach(example_source ${example_sources})
  # Create the basename for the example
  get_filename_component(example_name ${example_source} NAME)
  string(REPLACE ".c" "${OUTPUT_EXT}" example_name ${example_name})

  # Setup the example
  add_executable(${example_name} ${example_source})

  target_link_libraries(${example_name} raylib)

  string(REGEX MATCH ".*/.*/" resources_dir ${example_source})
  string(APPEND resources_dir "resources")

  if(${PLATFORM} MATCHES "Web" AND EXISTS ${resources_dir})
    # The local resources path needs to be mapped to /resources virtual path
    string(APPEND resources_dir "@resources")
    set_target_properties(${example_name} PROPERTIES LINK_FLAGS "--preload-file ${resources_dir}")
  endif()
endforeach()

if (${PLATFORM} MATCHES "Desktop")
  # rlgl_standalone can't be linked with raylib because of duplicate rlgl symbols
  foreach (example_source "others/rlgl_standalone.c")
    # Create the basename for the example
    get_filename_component(example_name ${example_source} NAME)
    string(REPLACE ".c" "${OUTPUT_EXT}" example_name ${example_name})
    add_executable(${example_name} ${example_source})
    add_dependencies(${example_name} raylib)
    target_link_libraries(${example_name} ${raylib_LDFLAGS})
    target_include_directories(${example_name} PRIVATE ${raylib_INCLUDE_DIRS})

  endforeach()
endif()

# Copy all of the resource files to the destination
file(COPY ${example_resources} DESTINATION "resources/")
